Start-Up And Shutdown; Heating System Start-Up - Viessmann VITODENS Operating Instructions Manual

Start-up and shutdown

Heating system start-up

Position of the gas shut-off valve for
Vitodens 333
10
1. Check the heating system pressure
on pressure gauge A: The system
pressure is too low if the needle
indicates below 0.8 bar. In that
case, top up with water or contact
your local heating contractor.
2. For open flue operation: The com-
bustion air is drawn from the boiler
room.
Check whether the ventilation/
exhaust apertures in the boiler
room are open and unobstructed.
3. On Vitodens and Vitopend:
Open gas shut-off valve B.
On Vitoplus:
Open the shut-off valves in the oil
supply lines (at the oil tank and the
filter).
4. Switch ON the mains power supply;
e.g. at a separate fuse or a mains
electrical isolator.
5. Switch ON main ON/OFF switch 8
C;
standby mode is then indicated by
the green indicator (ON indicator);
after a short time the boiler tem-
perature will be displayed. Your
heating system and, if installed,
your remote control unit are now
ready for use.